常用php函数，来自互联网
【摘要】
function getFirstCharter($str){ if(empty($str)){return '';} $fchar=ord($str{0}); if($fchar>=ord('A')&&$fchar<=ord('z')) return strtoupper($str{...
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function getFirstCharter($str){
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if(empty($str)){return '';}
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$fchar=ord($str{0});
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if($fchar>=ord('A')&&$fchar<=ord('z')) return strtoupper($str{0});
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$s1=iconv('UTF-8','gb2312',$str);
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$s2=iconv('gb2312','UTF-8',$s1);
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$s=$s2==$str?$s1:$str;
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$asc=ord($s{0})*256+ord($s{1})-65536;
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if($asc>=-20319&&$asc<=-20284) return 'A';
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if($asc>=-20283&&$asc<=-19776) return 'B';
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if($asc>=-19775&&$asc<=-19219) return 'C';
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if($asc>=-19218&&$asc<=-18711) return 'D';
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if($asc>=-18710&&$asc<=-18527) return 'E';
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if($asc>=-18526&&$asc<=-18240) return 'F';
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if($asc>=-18239&&$asc<=-17923) return 'G';
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if($asc>=-17922&&$asc<=-17418) return 'H';
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if($asc>=-17417&&$asc<=-16475) return 'J';
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if($asc>=-16474&&$asc<=-16213) return 'K';
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if($asc>=-16212&&$asc<=-15641) return 'L';
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if($asc>=-15640&&$asc<=-15166) return 'M';
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if($asc>=-15165&&$asc<=-14923) return 'N';
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if($asc>=-14922&&$asc<=-14915) return 'O';
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if($asc>=-14914&&$asc<=-14631) return 'P';
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if($asc>=-14630&&$asc<=-14150) return 'Q';
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if($asc>=-14149&&$asc<=-14091) return 'R';
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if($asc>=-14090&&$asc<=-13319) return 'S';
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if($asc>=-13318&&$asc<=-12839) return 'T';
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if($asc>=-12838&&$asc<=-12557) return 'W';
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if($asc>=-12556&&$asc<=-11848) return 'X';
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if($asc>=-11847&&$asc<=-11056) return 'Y';
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if($asc>=-11055&&$asc<=-10247) return 'Z';
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return null;
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}
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公司同事整理的类,挺实用的.相信拿出来分享下他不会介意的O(∩_∩)O.不过如果首字母是数字或英文会有些问题.
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/**
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* Helper_Spell 汉字拼音首字母工具类
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*
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* @category Helper
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* @package Helper_Spell
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* @author Lancer <lancer.he@gmail.com>
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* @version 1.0
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* @see Translation_Big2gb
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*/
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class Helper_Spell {
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/**
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* $_pinyins
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* @var array
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* @access private
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*/
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private $_pinyins = array(
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176161 => 'A',
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176197 => 'B',
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178193 => 'C',
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180238 => 'D',
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182234 => 'E',
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183162 => 'F',
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184193 => 'G',
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185254 => 'H',
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187247 => 'J',
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191166 => 'K',
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192172 => 'L',
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194232 => 'M',
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196195 => 'N',
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197182 => 'O',
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197190 => 'P',
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198218 => 'Q',
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200187 => 'R',
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200246 => 'S',
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203250 => 'T',
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205218 => 'W',
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206244 => 'X',
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209185 => 'Y',
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212209 => 'Z',
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215249 => 'Z',
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);
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/**
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* $_charset
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* @var string
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* @access private
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*/
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private $_charset = null;
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/**
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* __construct 构造函数, 指定需要的编码 default: utf-8 支持utf-8, gb2312
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*
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* @param unknown_type $charset
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*/
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public function __construct( $charset = 'utf-8' ) {
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$this->_charset = $charset;
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}
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/**
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* getInitialsFirst 返回首个汉字的拼音
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*
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* @access public
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* @static
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* @param string $str
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* @return string
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* @example Helper_Spell::getInitialsFirst('我的爱'); => w
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*/
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public static function getInitialsFirst( $str, $charset = 'utf-8' ) {
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$chars = array(
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'A','B','C','D','E','F',
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'G','H','I','J','K','L',
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'M','N','O','P','Q','R',
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'S','T','U','V','W','X',
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'Y','Z');
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$string = self::getInitials( $str );
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$length = strlen($string);
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for($i=0; $i < $length; $i++) {
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if ( in_array( $string{$i}, $chars ) ) {
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return $string{$i};
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}
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}
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return '*';
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}
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/**
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* getInitials 返回拼音组合
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*
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* @access public
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* @static
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* @param string $str
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* @return string
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* @example Helper_Spell::getInitials('我的爱'); => wda
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*/
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public static function getInitials( $str, $charset = 'utf-8' ) {
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$instance = new Helper_Spell( $charset );
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return $instance->_getInitials( $str );
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}
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/**
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* _getInitials 获取中文字串的拼音首字符
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* 注：英文的字串：不变返回(包括数字) eg .abc123 => abc123
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* 中文字符串：返回拼音首字符 eg. 王小明 => WXM
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* 中英混合串: 返回拼音首字符和英文 eg. 我i我j => WIWJ
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*
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* @access private
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* @param string $str
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* @return string
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*/
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private function _getInitials( $str, $translation=TRUE ){
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if ( empty($str) ) return '';
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if ( $this->_isAscii($str[0]) && $this->_isAsciis( $str ))
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return $str;
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if ( $translation )
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$str = Translation_Big2gb::big2gb( $str );
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$result = array();
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if ( $this->_charset == 'utf-8' ){
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//IGNORE很重要，加上这个就可以是ICONV()函数忽略错误，继续执行
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$str = iconv( 'utf-8', 'gbk//IGNORE', $str );
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}
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$words = $this->_cutWord( $str );
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foreach ( $words AS $word ) {
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if ( $this->_isAscii($word) ) {//非中文
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$result[] = $word;
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continue;
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}
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$code = ( ord(substr($word,0,1)) ) * 1000 + (ord(substr($word,1,1)));
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//获取拼音首字母A--Z
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if ( ($i = $this->_search($code)) != -1 ){
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$result[] = $this->_pinyins[$i];
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}
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}
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return strtoupper(implode('', $result));
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}
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/**
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* _msubstr 获取中文字符串
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*
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* @access private
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* @param string $str
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* @param int $start
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* @param int $len
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* @return string
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*/
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private function _msubstr ($str, $start, $len) {
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$start = $start * 2;
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$len = $len * 2;
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$strlen = strlen($str);
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$result = '';
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for ( $i = 0; $i < $strlen; $i++ ) {
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if ( $i >= $start && $i < ($start + $len) ) {
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if ( ord(substr($str, $i, 1)) > 129 ) $result .= substr($str, $i, 2);
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else $result .= substr($str, $i, 1);
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}
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if ( ord(substr($str, $i, 1)) > 129 ) $i++;
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}
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return $result;
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}
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/**
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* _cutWord 字符串切分为数组 (汉字或者一个字符为单位)
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*
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* @access private
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* @param string $str
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* @return array
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*/
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private function _cutWord( $str ) {
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$words = array();
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while ( $str != "" ) {
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if ( $this->_isAscii($str) ) {//非中文
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$words[] = $str[0];
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$str = substr( $str, strlen($str[0]) );
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} else {
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$word = $this->_msubstr( $str, 0, 1 );
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$words[] = $word;
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$str = substr( $str, strlen($word) );
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}
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}
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return $words;
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}
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/**
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* _isAscii 判断字符是否是ascii字符
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*
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* @access private
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* @param string $char
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* @return bool
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*/
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private function _isAscii( $char ) {
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return ( ord( substr($char,0,1) ) < 160 );
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}
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/**
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* _isAsciis 判断字符串前3个字符是否是ascii字符
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*
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* @access private
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* @param string $str
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* @return bool
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*/
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private function _isAsciis( $str ) {
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$len = strlen($str) >= 3 ? 3: 2;
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$chars = array();
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for( $i = 1; $i < $len -1; $i++ ){
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$chars[] = $this->_isAscii( $str[$i] ) ? 'yes':'no';
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}
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$result = array_count_values( $chars );
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if ( empty($result['no']) ){
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return true;
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}
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return false;
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}
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/**
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* _getChar 通过ASC码返回字母或者数字
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*
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* @access private
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* @param string $ascii
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* @return string
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*/
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private function _getChar( $ascii ){
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if ( $ascii >= 48 && $ascii <= 57 ) {
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return chr($ascii); //数字
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} elseif ( $ascii>=65 && $ascii<=90 ) {
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return chr($ascii); // A--Z
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} elseif ($ascii>=97 && $ascii<=122 ) {
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return chr($ascii-32); // a--z
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} else {
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return '~'; //其他
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}
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}
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/**
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* _search 查找需要的汉字内码(gb2312) 对应的拼音字符(二分法)
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*
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* @access private
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* @param int $code
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* @return int
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*/
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private function _search( $code ) {
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$data = array_keys($this->_pinyins);
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$lower = 0;
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$upper = sizeof($data)-1;
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// 排除非一级汉字
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if ($code < $data[0] || $code > $data[23]) return -1;
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for (;;) {
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if ( $lower > $upper ){
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return $data[$lower-1];
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}
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$middle = (int) round(($lower + $upper) / 2);
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if ( !isset($data[$middle]) ) {
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return -1;
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}
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if ( $data[$middle] < $code ){
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$lower = (int)$middle + 1;
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} else if ( $data[$middle] == $code ) {
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return $data[$middle];
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} else {
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$upper = (int)$middle - 1;
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}
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}// end for
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}
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}
文章来源: coderfix.blog.csdn.net，作者：小雨青年，版权归原作者所有，如需转载，请联系作者。
原文链接：coderfix.blog.csdn.net/article/details/17239669
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